When to change halide bulb

peggy

New Member
How often does a metal halide bulb need to be changed. Is it as frequent as a power compact (e.g., 6 - 8 months)? I thought I remember reading somewhere that they don't need to be changed until they burn out. Hope everyone has a safe and happy Holiday season!
 

jonthefishguy

Active Member
Originally Posted by peggy
How often does a metal halide bulb need to be changed. Is it as frequent as a power compact (e.g., 6 - 8 months)? I thought I remember reading somewhere that they don't need to be changed until they burn out. Hope everyone has a safe and happy Holiday season!
You are supposed to change them out once a year. You dont change them and then continue to run your normal time. If you change them all at once, cut your time they are on back a few hours as the new bulbs will be at full spectrum and can bleach your coral. Every week add an hour till you have it back at the regular time. If you change one at at time, replace them at a 2 week interval.
 
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